William hamilton



dilated time @Meer @ittica WILLIAM HAMILTON, vOF TORONTO, CANADA, ASSIGNOR TOHIMSELF AND HIRAM KIMBALL, OF RANDOLPH, VERMONT.

Letters Patent No. 96,105, dated October 26, 1869.

IMPRQVEMENT IN' FLUID-METERS.

To all whom it 'may concern Be it known that I, WILLIAM HAMlLToN, of Toronto, Canada, have invented a new and improved -meehanism, which move without appreciable friction or consumption of power. The throwof the valves is instantaneous when the stroke is4 to be changed, and the-apparatus is adapted to operate with uniform accuracy under variations in the pressure and volume of the'nid to be measured.

In the drawings;

Figure l represents a longitudinal section of the apparatus in the planes indicated by the line x x, g. 3.

Figure 2, a vertical longitudinal section ofthe same on the line y y, iig. 3.

Figure 3, a vertical transverse sectionon the line z z, figs. l and 2.

Figui-ese and 5 are sectional elevations of detached parts of mechanism employed for shifting or reversing the valves-.

Figure Gis an elevation of mechanism employed for converting oscillating orreciprocating rectilinear into intermittent rotary motion to operate the index.

The uid entering at the port I, and following in the course indicated by the arrows in fig. 1, presses against a piston, A, mounted upon a guiderod or rods, B.

Annular diaphragms, C C, connected to the respective ends ofthe piston A, and-to the inside of the cylinder K, within which the piston worksloosely, serve tio-separate the ends of the said cylinder, while dispensing with the necessity for packed or frictional surfaces.

It is immaterial whether a single guide-rod is employed, running through and attached rigidly to the piston, and working loosely in chambers in the cylinderheads, or two rods att-ached rigidly to the respective heads ofthe cylinder, and entering separate chambers in the ends of the piston.

G G are valves, attached to a valve-rod, G', and employed to place the inlet-port Iand the dischargeport H, respectively, in communication with vopposite and alternate ends of the cylinder K.

Attached -to the piston A is a rack, a, gearing with a quadrant, D, which is keyed to a shaft, O.

E represents a weight, mounted upon the upper end of an am), E', which is fitted loosely on theshaft 0,l

but is so connected with the said shaft by means of the clutch-joint represented in fig. 5, or by any other suitable device, as to lim-it .the revolution of the arm E', independently of the shaft O, to an arc of about ninety degrees.

Mounted loosely on the shaft O are also a pair of arms, F F, connected rigidly to a hub, F, which forms on each side a knuckle or toggle joint with a rod, I?, which rods, as each is alternately thrown up from its oblique to its horizontal position by the motion of the connected arms F F, drives the valve-rod G from right to left, or cioe tersa, actuating both valves G G simultaneonsly, and pressing each on to one or the other of its seats with great force.

The drawings show the piston at about half stroke,` the weight-arm E having risen forty-five degrees from its horizontal position.

As the piston reaches the end of its stroke, the arm E being carried slightly beyond a vertical position, the weight E falls suddenly, and instantaneously shifts the valves so as to throw the respective ports H and I into communication with the opposite ends ofthe cylinder K. The piston then moves in the opposite direction.`

The piston A may be made of wood or metal, in the latter case being made hollow, and its interior in com-v munication with the discharging end of the cylinder.

T he mechanismi D E E F 1, and the'accessories thereof, also work in the discharging-water.

The weight E may preferably be constructed, as represented, with a transverse chamber or cavity, e, containing a quantity of quicksilver and water suticient to ill the remaining space, the objectof which is bythe iiow of the quicksi-lver back and forth in said chamber on its ends being depressed in the movements of the weight, to render those'prtions of the move- I nents of said weight, in which it operates the valves, more rapid and powerful, the weight being also thus rendered more sensitive.

The water is to lessen the diminution of the specific gravity of the weight, 'which would result -from the space forthe movement of the quicksilver.

The outer end of the oscillating shaft is to be con nected with the registering-mechanism by `suitable means, a preferred form. of which is represented in fig. 6.

A pinion, L, is keyed fast to said shaft O, and is meshed by a rack, M, to one end of which is hinged a pair of ratchet-racksor pawls, m m, facing each other, and having their teeth bevelled on' opposite sides, which, engaging respectively with opposite sides of a ratchet-wheel or pinion, N, on a shaft, O', ofthe registering-mechanism, impart in the same direction to said shaft the movement resulting from each stroke of the piston as transmitted through the rack c, quadrant D, and shaft O.

The shaft 0 O may be connected with the shaft or shafts of one,` or a train or series of indexes in any usual or suitablemanner.

The lower or both of the pawls mI mfmay be pressed in contact with the ratchet-wheel N, by one or more' suitably-applied springs or weights.

The rack proper M isA supported in suitable guides. The registering-motion maybe taken from any suitable moving part of the apparatus other than the shaft' O, if preferred, and the vnaturel of the converting -mechanism modified accordingly. Thus where motion is taken' from the pistou, the pinion L and rack M may be dispensed with, and a rod projecting longitudinally from the piston takeihe place of the latter.

It will be'observed that the parts in contact with the Water are completely balanced by it, and packing is entirely dispensed with.

The apparatus is tbus'adapted to operate with very slight power or pressure, audits results are positive -and absolutely accurate by reason of the instantaneous shifting of the valves at the termination of each stroke of the piston.

Having thus described my invention, What I claim, and desire to secure by Letters Paty ent is l. The combination and arrangement, substantially as described, of the balancedv reciprocating piston A C C, and balanced valves G G, constructed and operated substantially in the manner described, for thev purpose set forth.

2. The combination, with the valves G G, mounted on a common rod, G', of the oscillating arms F F l F',- constructed and operated substantially as de-r, scribed, 'for the purpose set forth.

3. In combination With the piston A and the oscil' lating shaft Q, actuated by said pistou, the weight E Witnesses W. B. DEMING, JOHN G RINNELL. 

